Active Steering Control Knob Moves Out Of Alignment - Toyota 8FGU15 Repair Manual

8 TROUBLESHOOTING
Phenomenon on
Control type
vehicle
Knob moves out of
alignment into a cer-
tain position.
Active steering con-
trol
(More than 10° off
the straight ahead
position)
Malfunction area
Checking method
and mode
▪ Tire angle
sensor unit:
Sensor defect
Tire angle sensor
▪ Tire angle
voltage check: Oper-
sensor installa-
ate the steering and
tion:
check the change in
Looseness of
voltage.
the attachment
part, damage,
bearing housing
damage
▪ Tire angle
sensor matching
value:
-
Does not match
actual status (re-
match)
▪ Steering angle
sensor unit:
Sensor defect
ON/OFF check with
▪ Steering angle
analyzer
sensor installa-
tion:
Cam or steering
wheel defect
Using an active test,
turn the knob com-
pensation SOL ON
and OFF and oper-
ate the steering at
the tire end.
▪ Knob compensa-
tion valve unit:
SOL ON: check that
the steering wheel
Leak, stuck, (in-
can be turned freely.
ternal damage)
SOL OFF: Check
that the steering
wheel cannot be
turned freely (steer-
ing is heavy).
▪ SAS/OPS con-
troller:
-
Controller defect
8-175
Corrective action
If there is no
change, perform an
installation check or
replace the sensor.
Follow matching pro-
cedure to rematch.
Harness check or re-
place sensor
Replace
Replace
8